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CVE-2008-0166

75
FAUCET Score

CVE-2008-0166 describes a critical vulnerability in OpenSSL versions 0.9.8c-1 through before 0.9.8g-9 on Debian-based operating systems, where a flawed random number generator produces predictable numbers. This weakness allows remote attackers to conduct brute-force attacks against cryptographic keys, primarily impacting Debian and Ubuntu Linux distributions. The vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high confidentiality impact. While not listed in CISA's KEV, exploit code is publicly available on ExploitDB, and it has garnered significant community discussion and media coverage, highlighting its historical importance.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.9.8c-1, <= 0.9.8gCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
6.06CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:6.06:*:*:*:*:*:*:*
7.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:7.04:*:*:*:*:*:*:*
7.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:7.10:*:*:*:*:*:*:*
8.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:8.04:*:*:*:-:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
70.72%
Probability of exploitation in next 30 days
EPSS Percentile
99.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
ExploitDB: EDB-5720 · Jun 1, 2008
This CVE's current EPSS score of 0.7072 is in the 99th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

debianpatch availablevia nvd_reference
View patch
ubuntupatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2008-0166

CVE-2008-0166

References

metasploit.com / users/hdm/tools/debian-openssl
Broken Link
16years.secvuln.info
secunia.com / advisories/30136
Broken LinkVendor Advisory
secunia.com / advisories/30220
Broken LinkVendor Advisory
secunia.com / advisories/30221
Broken LinkVendor Advisory
secunia.com / advisories/30231
Broken LinkVendor Advisory
secunia.com / advisories/30239
Broken LinkVendor Advisory
secunia.com / advisories/30249
Broken LinkVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/42375
Third Party AdvisoryVDB Entry
news.ycombinator.com / item
sourceforge.net / mailarchive/forum.php
Third Party Advisory
exploit-db.com / exploits/5622
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/5632
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/5720
ExploitThird Party AdvisoryVDB Entry
debian.org / security/2008/dsa-1571
Mailing ListPatchVendor Advisory
debian.org / security/2008/dsa-1576
Mailing ListPatch
kb.cert.org / vuls/id/925211
Third Party AdvisoryUS Government Resource
securityfocus.com / archive/1/492112/100/0/threaded
Broken LinkThird Party AdvisoryVDB Entry
securityfocus.com / bid/29179
Broken LinkExploitThird Party AdvisoryVDB Entry
securitytracker.com / id
Broken LinkThird Party AdvisoryVDB Entry
ubuntu.com / usn/usn-612-1
PatchThird Party Advisory
ubuntu.com / usn/usn-612-2
PatchThird Party Advisory
ubuntu.com / usn/usn-612-3
Third Party Advisory
ubuntu.com / usn/usn-612-4
Third Party Advisory
ubuntu.com / usn/usn-612-7
Third Party Advisory
us-cert.gov / cas/techalerts/TA08-137A.html
Broken LinkThird Party AdvisoryUS Government Resource